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Review usage of string.Substring (part 1)

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Reduced allocations by replacing string.Substring with ReadOnlySpan<char>.Slice
This commit is contained in:
Bond_009
2020-07-22 13:34:51 +02:00
parent 0750357916
commit febb6bced6
25 changed files with 124 additions and 99 deletions
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11
MediaBrowser.MediaEncoding/Subtitles/SrtParser.cs
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@@ -1,3 +1,5 @@
#pragma warning disable CS1591
using System;
using System.Collections.Generic;
using System.Globalization;
@@ -20,6 +22,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
_logger = logger;
}
/// <inheritdoc />
public SubtitleTrackInfo Parse(Stream stream, CancellationToken cancellationToken)
{
var trackInfo = new SubtitleTrackInfo();
@@ -55,11 +58,11 @@ namespace MediaBrowser.MediaEncoding.Subtitles
}
subEvent.StartPositionTicks = GetTicks(time[0]);
var endTime = time[1];
var idx = endTime.IndexOf(" ", StringComparison.Ordinal);
var endTime = time[1].AsSpan();
var idx = endTime.IndexOf(' ');
if (idx > 0)
{
endTime = endTime.Substring(0, idx);
endTime = endTime.Slice(0, idx);
}
subEvent.EndPositionTicks = GetTicks(endTime);
@@ -88,7 +91,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
return trackInfo;
}
long GetTicks(string time)
private long GetTicks(ReadOnlySpan<char> time)
{
return TimeSpan.TryParseExact(time, @"hh\:mm\:ss\.fff", _usCulture, out var span)
? span.Ticks